I have a pre modified rtl-sdr like this
which can receive vhf and shortwave directly.
On windows shortwave listening works fine with hdsdr if I enable
direct-sampling on Q branch in extIO.
Now I am on Linux and I am tested gnu radio.
GNU Radio is by building with blocks a very powerful tool. But it seems
there is no way to receive HF except with a HF up converter.
I there any other way to receive shortwave on GNU radio?
Thanks for your answers in advance.